Add license type: Apache2+MIT are NOTICE licenses am: ce8e133bd7

Change-Id: I9559ee186ae5470038deb90733c337e01526da2c
diff --git a/METADATA b/METADATA
index 966ee5c..2b372ac 100644
--- a/METADATA
+++ b/METADATA
@@ -12,5 +12,6 @@
     value: "https://github.com/benjaminp/six"
   }
   version: "1.11.0"
+  license_type: NOTICE
   last_upgrade_date { year: 2018 month: 1 day: 4 }
 }